Demand vs. Supply: Definition | Differences | Example

Supply and demand regulate what suppliers are willing to produce and what customers are willing and able to buy. Demand is the willingness and ability to pay for a good. “Supply” refers to a product’s total amount available for sale.

The primary distinction between supply and demand is that supply is how much of a product customers want, while demand is how much of a product suppliers are expected to provide. Demand and Supply are in the opposite direction of each other, so when one goes up, the other goes down.

What is a Market?

A market is a place where buyers and sellers come together to trade goods, services, and other important information. These two groups can get together in a city, state, province, country, or region. The market may be a physical or virtual.

What is Supply?

Supply is the amount and quantity of goods to be given and sold to buyers and customers. The greater the goodwill price, the more products must be delivered. Supply increases with price.

Supply curves often slope upward. When demand is high, supply rises; when it falls, a shortage results. The supply is based on criteria such as the price of goods or services, the number of market suppliers, changes in technology, the state of nature, and potential price increases.

Market suppliers’ bargaining strength promotes product supply. Supply shows suppliers’ willingness and how much can be supplied during a certain time period.

What is Demand?

Demand describes the consumer’s desire and willingness to purchase a good or service at a specific time or over an extended period of time. Additionally, consumers must be able to afford the items they want or need based on their budgeted disposable income. Demand therefore has an impact on market expansion and economic growth.

Demand has two factors. First, it depends on consumer demand. Consumer taste and preference. Second, demand depends on consumers’ ability to pay a given price. So, the buyer must have enough money to pay.

Law of Supply and Demand

In a market economy, supply and demand are important factors in determining how much a given good will cost. Due to resource limitations, not all that is needed can be delivered because consumer needs are limitless. Here, the link between supply and demand is crucial for effective resource allocation and setting the market price for the good or service, also known as the equilibrium price. This price indicates the price at which the market’s buyers and suppliers are willing to transact.

By paying attention to market economic theories, one can better comprehend how supply and demand determine market price.

Law of Demand

Customers purchase less of a product when the price of it rises, while demand for it increases when the price of the product drops.

supply and demand curves

You can see in the graph that the horizontal axis shows the amount requested, and the vertical axis the price of a good. The inverse relationship between price and quantity demand is shown by the demand curve.

Law of Supply

When a commodity’s price rises, more things will be created and made accessible for purchase, and vice versa; conversely, when prices fall, there will be less available. this results from the fact that the profit margin will be bigger the higher the price.

supply and demand graph

The horizontal axis in this graph denotes the quantity delivered, and the vertical axis reflects the cost of a good. Price and amount delivered are directly related, as seen by the supply curve.

Key Differences

  • In contrast to demand, which is defined as the need for a product or service from customers to be used by sellers, supply is defined as making products or services available to users and customers for their use.
  • Supply is inversely correlated with price and decreases as the price rises, but demand is positively correlated with price and grows as the price rises.
    Demand is depicted as having a downward slope, while the supply curve has an upward inclination.
  • Demand expresses the willingness of consumers to purchase products, whereas Supply represents the readiness of sellers and businesses to sell such products.
  • Since demand and supply are inversely correlated, when one increases, the other decreases.
  • Demand is determined by the negotiating power of the buyer of the products, whereas Supply is determined by the bargaining power of the supplier who supplies the product.
  • Demand represents the tastes and preferences of the customers and buyers for the products, whilst Supply represents the seller’s stock availability of the product in the market.


Each product category has a plethora of replacements on the market, so a sharp change in price will have an effect on those products and could affect both supply and demand. Without ignoring the price at which the product is supplied, an equilibrium between the quantity required and the amount supplied must be maintained in this circumstance.